Biblical letter (7)
I believe the answer is:
epistle
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">biblical letter</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for epistle that I've seen before include "Letter from a saint" , "Long formal letter (found in the New Testament?)" , "a for instance" , "(E.g. Paul's) letter" , "Letter, in the Bible perhaps" .)